These are not minor discoveries, but finds that are rewriting what we know of history.
What sorts of things might we discover in the near future? A brief list might include a Viking ship in North America, the lost Roanoke colony in Virginia or the tomb of Alexander the Great. Remember, while the terracotta army has been excavated, the tomb of China's First Emperor has yet to be touched.
These are things we can imagine because we know about them from historical texts. But the most amazing discoveries will likely be ones we cannot even consider because they predate writing.
Written history covers less than a percent of human time on Earth. Even from well-documented periods, such as the Roman Empire, we know very little about the Illyrians or Celtic Britain. These prominent cultures stood up to Rome, but are incorrectly assumed to be minor because we lack their histories.
We have history-based bias, but there are many unrecorded conquerors, battles and Romeo and Juliets in the vastness of prehistory whose stories are waiting to be told. Prehistoric finds like Hoyo Negro's earliest American (found 2010), the Hobbit-like species Homo floresiensis (found 2003), and insight into the first artists (2013) suggest the best stories may await discovery.